The effect and role of adult probiotics are reflected in the protection of intestinal function, promote food digestion and absorption, enhance human immunity and so on. 1. Protecting intestinal function: taking adult probiotics can increase the beneficial bacteria in the intestinal tract. The increase of beneficial bacteria can regulate the intestinal flora and play a protective role for the intestinal tract. 2. Promote food digestion and absorption: Taking probiotics can reduce the concentration of lactose and produce lactic acid, thus helping food digestion and absorption. 3. Enhance human immunity: while regulating the intestinal flora, probiotics can also optimize the immune response of the intestinal tract, which can enhance human immunity. It is recommended to use the medication under the guidance of a doctor, not blindly self-medication to avoid adverse effects.